新山 雅之
   所属   京都産業大学  理学部 物理科学科
   職種   教授
言語種別 英語
発行・発表の年月 2003
形態種別 研究論文(国際会議プロシーディングス)
査読 査読あり
標題 Evidence for an exotic S=+1 baryon resonance at a mass of 1540 MeV
執筆形態 その他
掲載誌名 INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS
出版社・発行元 AMER INST PHYSICS
巻・号・頁 698,pp.539-542
著者・共著者 KH Hicks,DS Ahn,JK Ahn,H Akimune,Y Asano,WC Chang,S Date,H Ejiri,H Fujimura,M Fujiwara,K Hicks,T Hotta,K Imai,T Ishikawa,T Iwata,H Kawai,ZY Kim,K Kino,H Kohri,NK Gai,S Makino,T Matsumura,N Matsuoka,T Mibe,K Miwa,M Miyabe,Y Miyachi,M Morita,N Muramatsu,T Nakano,M Niiyama,M Nomachi,Y Ohashi,T Ooba,H Ohkuma,DS Oshuev,C Rangacharyulu,A Sakaguchi,T Sasaki,R Shagin,Y Shiino,H Shimizu,Y Sugaya,MS Hama,H Toyokawa,A Wakai,CW Wang,SC Wang,K Yonehara,T Yorita,M Yoshimura,M Yosoi,RGT Zegers
概要 A new baryon resonance with manifestly exotic strangeness quantum number S = +1 was first observed from the LEPS detector at the SPring-8 facility in Japan. The photoproduction reaction gamman --> K(-)Theta(+) was measured, where the neutron is bound in a C-12 nucleus and the Theta(+) is the new name of this resonance. The existence of the Theta(+) was inferred by observing a peak in the missing mass spectrum of the K-, with the requirement of a coincident K+ in the detector from the decay of the Theta(+). The mass of the resonance is 1.54 +/- 0.01 GeV and a width of < 25 MeV.
ISSN 0094-243X